A 3.0-kg bowling ball experiences a net force of 8.0 N. What will be its acceleration?
a. 24 m/s2
b. 3.0 m/s2
c. 8.0 m/s2
d. 2.7 m/s2
e. 0.38 m/s2
[Ques. 2] What condition must apply to a system's state of motion for it to be regarded as an inertial frame of reference?
a. in decreasing velocity
b. in constant velocity
c. in constant acceleration
d. in increasing acceleration
[Ques. 3] Which of the following expresses a principle, which was initially stated by Galileo and was later incorporated into Newton's laws of motion?
a. An object's acceleration is inversely proportional to its mass.
b. For every action there is an equal but opposite reaction.
c. The natural condition for a moving object is to remain in motion.
d. The natural condition for a moving object is to come to rest.
[Ques. 4] If we know an object is moving at constant velocity, we may assume:
a. the net force acting on the object is zero.
b. there are no forces acting on the object.
c. the object is accelerating.
d. the object is losing mass.
[Ques. 5] Which of the following is an example of the type of force that acts at a distance?
a. gravitational
b. magnetic
c. electrical
d. all of the above
[Ques. 6] Is it possible for the total mechanical energy of a moving particle to be negative?
a. No, because a moving particle has positive kinetic energy.
b. No, because potential energy cannot have a value more negative than the value of the positive kinetic energy of the particle.
c. Only if friction is involved.
d. yes
[Ques. 7] The net force acting on a 4.92-kg object is given by Fx = (10 x) N, where Fx is in newtons and x is in meters. How much work is done on the object as it moves from x = 0 to x = 12.4 m?
a. 61.0 J
b. 12.4 J
c. 47.1 J
d. 23.6 J
e. 35.3 J
[Ques. 8] The force acting on an object is given by Fx = (5x 10) N, where x is in meters. What is the net work done by the force as the object moves from x = 0 to x = 4.50?
a. 5.6 J
b. 15.6 J
c. 12.5 J
d. 11.3 J
[Ques. 9] A force of 130 N is applied to a 50-kg mass in the direction of motion for a distance of 6.0 m and then the force is increased to 170 N for the next 4.0 m. For the 10 m of travel, how much work is done by the varying force?
a. 1.5E+3 J
b. 1.5E+3 J
c. 7.3E+4 J
d. 2.9E+2 J
e. 1.4E+3 J
[Ques. 10] A baseball catcher puts on an exhibition by catching a 0.200-kg ball dropped from a helicopter at a height of 150 m above the catcher. If the catcher gives with the ball for a distance of 0.755 m while catching it, what average force is exerted on the mitt by the ball? (g = 9.80 m/s2)
a. 39.7 N
b. 294 N
c. 389 N
d. 399 N
e. 1110 N
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